File Maker Pro help

I need a form that has a pop up / drop down box that has a field change on each time a different item from the pop up box is selected. Let's say the pop up box has 3 items list. Client 1 Client 2 Client 3 When Client 1 is selected, I need a field labeled client_company to equal "Client 1 Company Name and a different field named client_address to equal "Client 1 Address" When Client 2 is selected, I need a field labeled client_company to equal "Client 2 Company Name and a different field named client_address to equal "Client 2 Address" When Client 3 is selected, I need a field labeled client_company to equal "Client 3 Company Name and a different field named client_address to equal "Client 3 Address" I am just basically looking for the code how to do this (along with sample form) and then I can go in and adjust it as needed once you get the formulas/scripts working. Seems pretty simple but I can't seem to figure it out. Thanks!